it would be better if the actuator could be stop where we want by the program in order to do a robot ;

and if there were no problems with NXTBee ( sometimes the AMX start randomly ... )

but it is fun

didier

Tue Dec 04, 2012 4:28 pm

mattallen37

Expert

Joined: Thu Sep 29, 2011 11:09 pmPosts: 184Location: Michigan USA

Re: AMX 13 bridge layer

That's pretty cool!

Why use a NXTBee (or two? I can't really tell if there is one connected to the left NXT)?

You know, if you want to communicate withing a robot (no need for it to be wireless), you can just connect the NXT's using an NXT cable (between sensor port 4 of each), and communicate using RS485 (at up to about 8 times the max speed that the NXTBees support).

_________________Matt

Tue Dec 04, 2012 7:10 pm

didiercoll

Novice

Joined: Sat Sep 15, 2012 11:28 amPosts: 68

Re: AMX 13 bridge layer

You know, if you want to communicate withing a robot (no need for it to be wireless), you can just connect the NXT's using an NXT cable (between sensor port 4 of each), and communicate using RS485 (at up to about 8 times the max speed that the NXTBees support).

fine !

the second NXTBee is behind the AMX , on the other side , you can not see it ;

well ; it is the idea I am looking for years and each time I ask the question to experts they say it is not possible to link with wirestwo NXT ;

The official RS485 support in NXC (I would assume ROBOTC would be similar), does not take care of any sort of SW layer network protocol. Basically you can send and receive raw bytes, but you need to design your own SW protocol. Usually I use a master/slave setup, where the mater initiates any communication, and the slave only "talks" if the master requests something.

As far as the HW, all I do is connect a cable between sensor port 4 of the NXTs.

_________________Matt

Wed Dec 05, 2012 12:19 pm

mattallen37

Expert

Joined: Thu Sep 29, 2011 11:09 pmPosts: 184Location: Michigan USA

Re: AMX 13 bridge layer

Check out this blog page. It covers several of the questions I had several years ago.

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